Belt gear



' (No Medel.) 2 sheets-sheet 1.

H. E. SMITH.

RBVBRSING BELT GEAR.

No. 411,738. Patented Sept. 24,1889.

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mi a e .LU IIIHI A TTUH/VEYS (No Model.) 2 sheets-sheen 2.

H. E. SMITH.

RBVERSING BELT GEAR.. No. 411,738. Patented Sept. 24, 1889.

ATTORNE YS N. PETERS. Phnfyumngnphu. wagwnzfw, n. c.

UNITED STATES i PATENT OFFICE. f

HAMILTON E. SMITI-I, OF NEIN? YORK, N. Y.

REVERSING- BELT GEAR.

SPECIFICATION forming part of Letters Patent No. 411,738, dated September 24, 1889.

Application tiled July 11, 1889.

To a/ZZ whom it may concern:

Be it known that l', HAMILTON E. SMITH, a citizen of the United States, residing at New York, in the county and State of New York, have invented new and useful Improvements in Reversingdelt Gears, of which the following is a specification.

This invention relates to certain improvements in a reversing-belt gear in which a counter-shaft is used, which is caused to make alternately and automatically a number of revolutions in one and then thesame number of revolutions in the opposite direction, and from which motion is imparted to the driving shaft or shafts of one or more working Inachines; and the object of my present invention is to construct the belt-gear so that the driving-belt of each Working machine can be thrown from the fast to the loose pulley, and vice versa, and locked as well when the counter-shaft turns in one as when the same turns in the opposite direction.

In the accompanying drawings, Figure l represents aperspective view of the reversingbelt gear as applied to three working machines. Fig. 2 is a plan or top yiewof one of the working machines on a larger scale than the previous figure. Figf3 is a longitudinal section showing the locking mechanism in the plane Fig. 4, on a larger scale than the previous iigures; and Fig. Il is a plan or top View of the parts shown in Fig.

Similar letters indicate corresponding parts.

In the drawings, the letter A designates a line-shaft, and B is a counter-shaft, on whichv are mounted three sets oi' fast and loose pulleys h b", b 12', h2 h, which connect by belts C C C`2 with the fast and loose pulleys c c", c 0", c2 02, which are mounted on the drivingshafts S S S2 of the Working machines. 0n the counter-shaft B are arranged side by side three pulleys D, E, and F, all having the same diameter andwidth of face. The outer pulleys I) and F are mounted loosely on the shaft B, While the middle pulley E is rigidly secured thereto. The belts G and H connect these pulleys with a wide driving-pulley I on the line-shaft A, the belt G being open and the belt H crossed. It it is assumed that the lineshaft A rotates continuously in the direction of arrow l, Fig. 1, the counter-shaft B is rotated in the direction of arrow 2 'when the Serial No. 317,119. (No model.)

open belt G is thrown on the fast pulley E and in the opposite direction (indicated by arrow 3) when the crossed belt His thrown on 55 the fast pulley. To shift the belts G and H alternately on and off the fast pulley E, I make use of a shifting mechanism which is actuated from the lineshaft A, and which consists of a cam J, made in the shape of a drum,to which 6o a rotary motion in one direction is imparted from the lineshaft A by any suitable means. The cam .I is loosely mounted on a shaft K2, having its bearings in hangers K3. In the said cam are formed two cam-grooves L2 M2, 65 which actuate the belt-shifter T for the belts G H in such a manner that they actuate rst .v one belt-shifter and then the other-*that is to say, the belt which is on the fast pulley E is shifted upon a loose pulley D or F, as the case -7o may be, before the belt on the loose pulley is moved at all, so that adverse forces do not act on the fast pulley. The cam-grooves are s0 timed that after the shifting of a belt from the fast pulley to a loose pulley a short inter- 7 5 val of time elapses before the second belt is moved toward the fast pulley. During this interval the momentum of the fast pulley and of the counter-shaft is partially r totally expended, and when the second belt is shifted 8o on the fast pulley no shock is caused, as a reversal ofv the rotation takes pla-ce. The cam J is rotated slowly in order te allow the counter-shaft to make ten or twelve revolutions before the belts are shifted.

Each, of the working machines is provided with its own belt-shifting mechanism, which consists of a slide K, Figs. 2, 3, and Ll, which slides in standards Z Z', rising from a bracket L, which is firmly secured to the working 9o machine. On the slide K is firmly secured a cross-bar M, on the ends of which are formed loops or eyes m m', each of which engages one branch of the belt C', by which motion is transmitted to the working machine. In the standard Z is mounted a shaft N, which can be turned by means of a handle n, and on which is firmly secu red an arm n, from which extends a pin n2, that engages a slot 7a, formed in a head 7s', which is firmly-secured to the roe slide K. lVhen the handle ln is turned to the position shown in full lines in Figs. 3 and 4, the belt C is thrown on the fast pulley c', Figs. 1 and 2, and the slide K is locked in this position, so that the belt is not liable to shift spontaneously, and when the handle n is turned to the position shown in dotted lines in Figs'. 3 and 4 the belt C is shifted upon the loose pulley 0', and the slide K is again locked, so that the belt is not liable to shift spontaneously.

From the foregoing description it will be seen that the direction in which the countershaft B revolves is changed automatically by the reversingbelt gear, so that the same makes, say, ten or twelve revolutions in one and then the same number of revolutions in the opposite direction, and this motion is transmitted to the shafts S S' S2 of the Working machines, and in order to be able to shift the belts C C CQof the Working machines at any desired moment the cross-bars M of the belt-shifting slides K are so constructed that they act on both branches of said belts, for if the belt-Shifters should act only on one branch of each of said belts these belts could only be shifted during the time the countenshaft turns in one direction, it being a Well-known fact that in order to shift the belt the beltshipper must a'ct upon the incoming branch of the belt.

What I claim as new, and desire Vto secure by Letters Patent, is-

l. The combination, with the counter-shaft B and with an automatic reversing-belt gear constructed to change the direction in which the counter-shaft turns automatically after a certain fixed number of revolutions, of a set of fast and loose pulleys b 5, mounted on the counter-shaft B, a set of fast and loose pulleys c 0, mounted on theshaft S of aworking machine, a belt for transmitting motion from the counterfshaftB to the shaft S, and abeltshifter constructed to engage both branches of this belt, whereby the belt can be shifted at any time independent of the direction in which the counter-shaft is revolved, substantially as described.

2. The combination, with the counter-shaft B and with an automatic belt-gear constructed to change the direction in which the countershaft turns automatically after a certain ixed number of revolutions, of a set of fast and loose pulleys b 5, mounted on the countershaft B, a set of fast and loose pulleys c 0, mounted on the shaft S of aworking machine, the belt C, the belt-shifting slide K, constructed to engage both branches of the belt C, the upright shaft N, the handle fn, the arm n', the pin n2, and the head 7c', secured to the slide K and engaging the pin n2, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

HAMILTON E. SMITH;

IVitnesses:

WILLIAM C. HAUFF, ERNST F. KASTENHUBER. 

